How can I get the mud?

Hint 1 of 4:

It is too deep to reach.

Hint 2 of 4:

A ladder or a rope would be handy.

Hint 3 of 4:

Tie your bungee rope to the railing. If you still do not have any, come back
later.

Hint 4 of 4:

You also need a bucket to put the mud in.